I have been moving away from powder setting products and have found the NYX brand deliver good quality for price, especially when trying something new. I feel like this does allow my makeup to stay put longer, especialy my eye makeup. One spritz from about 8 inches away from my face over each eye-lid and one for each cheek seems to be ideal. I do find the best result when I pause for a minute or two after spraying to let it dry a bit. I have been happy with the matte effect, it has not created any creasing, or powdery finish, but also will not create the 'airbrushed' or blended look that powder can, and will not mute the shimmer in any colors you have used. It just locks what you have done.
Tip: - Apply BEFORE mascara - Apply lightly (you don't need to drench your face, just mist slightly) - If you are prone to creased eye-shadow, make sure you target your eyes and keep your eyes closed to allow the setting spray to dry